If you want to get your feet wet check out my website: http://www.btcoincollector.com

You can watch videos, visit websites, or just put in your wallet address into many sites to start building a small balance.

If you want to have a significant amount then your best bet is to buy into them (virwox accepts paypal).  If you are a developer you can always keep an eye out for jobs that pay in bitcoins as well.